At the ACE Hardware they sell an electronic device that you plug in and it sends off a high pitch signal that rodents don't like & they leave. That is what the box says anyway, I have not tried it. Just my 2 cents worth on that.
If you poison them you just have to put up with the stink when they die in some unreachable spot..an old neighbor lady told me to take a big needle and thread and sew a piece of bacon to a rat trap, they can't get it off and its a gift that just keeps on giving, they can't resist that smelly bacon..my personal barn record is eleven with one little piece of bacon....
Consult a mouse "Intuitive", have the great transcended mice communicate through a "channel", have them talk to your mice, find out what their true purpose is, help them learn their true nature, once they have experienced tran****ation, moved to the next level, it is possible they will no longer be in the physical realm... and your problem is solved!
I killed a rat in my garage with my 2 pound shop hammer and DAM! Those little *******s are really ****ing juicy!
The ultrasonic things may work on some animals, but they sure as hell don't work on mice or spiders- despite what the boxes say. The peanut ****er ideas work as well as anything. I lived in the country for 13 years surrounded by cornfields....lots of mice.
We use the same method SeeDan does, nuts and peanut ****er. Wild bird food works as well as nuts mixed with the peanut ****er. Just keep the traps empty. My mother-in-law has these "Rat Zapper" things that seem to work pretty good but they use up batteries like crazy, she likes 'em because you can just pick up the unit and dump the carc*** into the trash without touching anything.
It's an old trick...read that Finnish miners in da UP used it to catch mice over 100 years ago. It does work.
I had one get in my blower, turn on the defrost and he went for a ride! was eating the paper filter. apparently a few hundred acres of pasture isn't enough, they just HAVE to ruin something. I used the spring traps, with some bacon or sausage wrapped in wire. that way, they have to really get after the trigger to get to the food. they licked the peanut ****er clean off.
I tried this with ground squirrels. Some pulleys, string, and a cinder block. with a piece of dental floss crossing under the suspended cinder block. Smear peanut ****er on the floss. Then sit and watch, they'll chew the floss till it breaks and the block crushes them. True it was a little elaborate, but totally worth it.